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861D Injector Pump Timing

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Author  [Modern View]

06-23-2020 15:50:12

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I am replacing the seals in my injector pump and am confused about the proper timing. The tractor manual I have says 18 deg btdc and the diesel supplement manual says 23 deg. Does anyone know which is correct and why there are two different numbers listed out there?

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welding man

06-25-2020 04:53:08

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 Re: 861D Injector Pump Timing in reply to Ranger63, 06-23-2020 15:50:12  
I start at 23 and then put them on the dyno and find the sweet spot.

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06-24-2020 03:33:28

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 Re: 861D Injector Pump Timing in reply to Ranger63, 06-23-2020 15:50:12  
Early pumps with no delivery valve were set at 18 degrees, late pumps with delivery valve were set at 23. Try both if you like, see what engine likes best. DO NOT ADJUST PUMP TIMING WHILE ENGINE IS RUNNING!

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06-23-2020 21:58:22

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 Re: 861D Injector Pump Timing in reply to Ranger63, 06-23-2020 15:50:12  
Thanks for the replies, I will use 18. Probably a mistake in the one manual.

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Colin King

06-23-2020 18:10:48

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 Re: 861D Injector Pump Timing in reply to Ranger63, 06-23-2020 15:50:12  
Either will work, but 18* is the updated recommendation.


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Shaun Wallace

06-23-2020 16:33:43

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 Re: 861D Injector Pump Timing in reply to Ranger63, 06-23-2020 15:50:12  
Use 18

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